Avet Ter-Gabrielyan was a Soviet Armenian violinist, founder and first violinist of the Komitas Quartet. He was named People's Artist of the Armenian SSR in 1945.
Born in Nakhichevan-on-Don, he studied violin with N. K. Averino. In 1929, he graduated from the Moscow State Conservatory, where he studied with Lev Zeitlin.
In 1923, Ter-Gabrielyan organized the first Armenian Soviet string quartet in Yerevan. He served as first violinist of the Komitas Quartet from 1924 to 1976. From 1929, he taught at the Moscow State Conservatory and became an associate professor in 1947.
He gave solo performances, appeared with the quartet and performed in ensembles with Alexander Goldenweiser, Konstantin Igumnov, Heinrich Neuhaus and Vladimir Merzhanov, as well as with orchestras. He won second prize at the All-Union Competition of Performing Musicians in 1935 and toured abroad.
Ter-Gabrielyan was named Honored Artist of the Armenian SSR in 1938 and received the Stalin Prize, second class, in 1946 for his concert performances with the Komitas Quartet. He also received the State Prize of the Armenian SSR in 1965. He died in Moscow in 1983.